port/protocol settings for the load balancer, where
lb-port is the external port number, protocol is the
external protocol, instance-port is the back end
server port number, instance-protocol is the protocol
to use for routing traffic to back end instances, and
cert-id is the ARN of the server certificate to use
for encrypted connections. lb-port, protocol, and
instance-port are required. This option may be used
multiple times. (at least 1 required)